湘西北下寒武统牛蹄塘组页岩气井位优选及含气性特征&mdash;&mdash;以常页1井为例

林拓，张金川，包书景，杨升宇，李博，何伟

doi:10.11764/j.issn.1672-1926.2015.02.0312

天然气地球科学 >

2015 , Vol. 26 >Issue 2: 312 - 319

DOI: https://doi.org/10.11764/j.issn.1672-1926.2015.02.0312

非常规天然气

湘西北下寒武统牛蹄塘组页岩气井位优选及含气性特征——以常页1井为例

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1.中国地质调查局油气资源调查中心，北京 100037；2.中国地质大学能源学院，北京 100083；3.中国华电工程(集团)有限公司，北京 100035

林拓(1984-)，男，浙江乐清人，博士，主要从事页岩气地质和资源评价研究.E-mail：everdeer@163.com.

收稿日期: 2014-03-17

修回日期: 2014-06-23

网络出版日期: 2015-02-10

基金资助

国家科技重大专项(油气专项)资助项目(编号：1211302108020)；中央高校基本业务费专项基金(编号：2012047)联合资助.

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The Optimum Selecting of Shale Gas Well Location and Gas Content of Lower Cambrian,Northwest Hunan:A Case Study of Well Changye

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1.Oil & Gas Survey,China Geological Survey,Beijing 100037,China；
2.School of Energy Resources,China University of Geosciences,Beijing 100083,China；
3.China Huadian Engineering Co.Ltd.,Beijing 100035,China

Received date: 2014-03-17

Revised date: 2014-06-23

Online published: 2015-02-10

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摘要

根据野外地质调查，结合区域构造特点和沉积背景研究，优选并实施钻探了湖南第一口牛蹄塘组页岩气调查井—常页1井，并通过取样测试分析、现场解析实验对牛蹄塘组含气性进行了定量分析。研究表明，常德市周边及以北的慈利—石门—澧县一带，沉积厚度大、分布稳定、地势平坦，是优选页岩气地质调查井位的有利区域。优选的常页1井揭示了牛蹄塘组富有机质页岩厚674.5m(真厚度)，是目前已知我国单井钻遇黑色页岩层系的最大厚度，其有机碳含量、现场解析含气量、等温吸附含气量具有明显的正相关关系，且随着深度的增加，三者都表现为先从顶部到中下部增大、再向底部减小的特点。位于牛蹄塘组中下部、井深为1 067～1 250m的黑色页岩、炭质页岩段，平均有机碳含量为10.14%，等温吸附气量为3.7～5.8 m³/t，现场解析总含气量为0.5～2.1m³/t，是该井页岩气发育的最有利层段，具有良好的勘探潜力。

关键词： 页岩气; 常页1井; 湘西北; 牛蹄塘组; 含气性

本文引用格式

林拓，张金川，包书景，杨升宇，李博，何伟 . 湘西北下寒武统牛蹄塘组页岩气井位优选及含气性特征——以常页1井为例[J]. 天然气地球科学, 2015 , 26(2) : 312 -319 . DOI: 10.11764/j.issn.1672-1926.2015.02.0312

Abstract

Based on field geological investigation,combined with structural and sedimentary setting,well Changye 1 which is the first investigation well aimed to the Niutitang Formation shale gas in Hunan was selected and drilled with priority.By sampling,experimental analysis,well site desorption test,the gas content characteristic of the Niutitang Formation marine shale was quantitatively analyzed.The results show that Changde City peripheral and Cili-Shimen-Lixian areas are favorable region for optimum selection of investigation well of shale gas.Well Changye 1 reveals 674.5m of the Niutitang Formation organic-rich shale,which is the biggest thickness of black shale in China up to now.Its TOC, gas content from well site desorption,gas content from isothermal adsorption simulation test have a clear positive correlation,with the features of increasing from top to the middle-lower,then decreasing to the bottom.The black shale in 1 067-1 250m which is also the middle-lower part of the Niutitang Formation is the most valuable depth of well Changye 1,which have a good exploration prospect,with 10.14% of average TOC,3.7-5.8 m³/t of gas content from isothermal adsorption simulation test,0.5-2.1 m³/t of gas content from well site desorption.

Key words： Shale gas; Well Changye 1; Northwest Hunan; Niutitang Formation; Gas properties

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